<p>With the development of the times, economy, technology and the requirements of the civil engineering industry in China have been improving constantly. In view of the low profit and high cost of the construction industry, BIM technology is used in the refined management of project cost to improve economic benefits. Based on this, the article introduces the concept of refined engineering cost management, discusses the problems in engineering cost refined management, and studies the feasibility of using BIM technology in engineering cost refined management.</p>